BEDMINSTER — Fatigue might have been a factor in the single-vehicle crash that killed a Phillipsburg man this morning on westbound Interstate 78 in Bedminster, according to a preliminary investigation by the State Police.

David Pandorf, 51, was ejected from his Dodge van after it veered off a right-hand lane, reentered the highway and spun into a center median and a concrete support post at the Bunn Road overpass, a State Police spokesman said.

Pandorf, who was not wearing a seat belt, was pronounced dead at the scene, the spokesman said.

The single-vehicle accident, reported at 5:30 a.m., shut down portions of the highway, just west of I-287 and backed up traffic through the morning commute.